Brake



Dec. 15, 1936.

L. E. LA BRIE BRAKE Original Filed Sept. 6, 1928 INVENTOR. Lu DGER E.LABRIE.

ATTORNEY Patented Dec. 15, 1936 UNlTED STATES PATENT OFFICE,

BRAKE Ludger E. La Brie, South'Bend, Ind., assignor to Bendix BrakeCompany, South Bend, Ind a corporation of Illinois Original applicationSeptember '6,

1928, Serial No.

304,196. Divided and this application August 30, 1933, Serial No.687,430

14 Claims. (01. 138-795) form of a member such as a resilient plate,c'arried by and floating with the adjustment, and which has means suchas an integral pawl which looks the adjustment.

The adjustment in its illustrated form includes a .r'ight-a'nd-leftthreaded member having adjustably threaded on, its ends shoe-engagingthrust parts, as for example pivots mounted in the ends of the shoes. Inthis case, the locking member may take the form of a resilient platehaving its ends mounted on the ends of the above-mentioned pivots, andprovided at its center with an integral pawl or the like engaging thethreaded adjusting member.

In this arrangement, the described resilient plate is preferably mountedon the side of,the shoes opposite the backing plate, thereby leavi'ngunobstructed an opening in the backing plate through which there may beinserted a tool for turning the adjusting member. The adjusting membermay be provided at its center with an enlarged collar having radialsockets for the tool, in which case the locking plate may be formed withan integral conical tooth or projection interlocking-with the sockets.

The above and other objects and features of. the invention, includingvarious novel combinations of parts and desirable particularconstructions, 'will be apparent from. the following de-' scription ofthe illustrative embodiment shown in the accompanying drawing, in which:

Figure 1 is a vertical section through a brake embodying the invention,just inside the head of the brake drum, and showing the brake shoes inside elevation;

Figure 2 is a section, on the line I ure 1, through the adjustment; and

' Figure 3 is a partial radial section on the line 3-3 of Figure 2.

The illustrated brake is more and is claimed, in-my'parent applicationNo.

2-: of. Figfully described,

304,196, filed September 6, 1928, from which all of the subject-matterherein claimed is divided. It comprises generally a rotatable drum ID,at the open side of which is arranged a support such as a backing platel2, and within which are arranged floating brake shoes l4 and I6 orequivalent friction means. i

The brake is applied, against the resistance of main and auxiliaryreturn springs 18 and 20, by means such as a floating cam lever 22. If ithe drum is turning clockwise when the brake .is applied, shoe I6anchors on a post 24 mounted on the backing plate; if the drum isturning counterclockwise the shoe I4 anchors on a similar post 26.Anchors 24 and 26 pass through openings 28 in the upper ends of theshoes;

The shoes may be provided with suitable steady rest pins 30 and steadyrests 32 and 34 which are more tully described and which are claimed inmy companion divisional application No. 687,- 431 filed August 30, 1933,now Patent No. 1,996,248 granted April 2,, 1935. The steady rest 34 isshown provided with a radially-adjustable roller 36 engaging andpositioning the shoe H.

The present invention relates to improved and simplified adjusting meansfor connecting the lower ends of the shoes i4 and H5, or otherwisearrangingthe brake so that it may be readily adjusted to compensate forwear.

The illustrated shoes i l and 16 have at their a lower ends pairs ofstamped steel plates 38 spotwelded or otherwise secured to the oppositesides of their webs, and. formed with registering grooves which (withslots cutin from the ends of the webs) form sockets 40 in the ends ofthe shoes. The sides of the sockets 40 are formed with openings formingbearings'for cylindrical surfa'ces adjacent the ends of thrust memberssuch as pivots 42, which pivots have their ends slidably resting'against'the backing plate l2, as shown in Figure 2.

The pivots 42 are formed with aligned transverse threaded openings intowhich are adjustably threaded the right-and-left threaded ends of a linkor other rigid connecting member 44.

The member 44 is formed centrally with a collar 46 having radial sockets48 for engagement with a tool inserted through an opening 50 in thebacking plate, to turn the adjusting member to take up for wear.

suitable cover 52. The ends .of the adjusting member 44 extend into thesockets 40, but with sufficient clearance to permit the shoes to havetheir necessary movement on the pivots-42.

The opening 50 may have a' "spaced integral tongues 56 embracing betweenthem the edge of the collar 46, and having between the tongues 56 anintegral conical tooth or pawl 58 yieldingly interlocking with thesockets 48;

The ends of the plate 54 are slotted to form I forked ends seated ingrooves in the ends of the pivots 42. For convenience of assembly, whilethe groove in one pivot 42 may be formed by an integral flange 60, thegroove in the other is preferably formed by a C-shaped spring washer 62slid downwardly into a'locking groove 64.

The resilience of plate 54 is sufficient normally to hold the pawl 58interlocked with one. of the sockets 48, but permits this lock to beovercome without undue force in turning the collar 46 to make anadjustment of the brake.

While one illustrative embodiment has been described in detail, it isnot my intention to limit the scope of the invention to that particularembodiment, or otherwise than by the terms of the appended claims.

1. A floating brake adjustment comprising a right-and-left threadedmember and thr st parts threaded on the ends thereof, and meanlcarriedby and floating with said adjustment anti holding said member yieldinglyagainst unintended turning. r 2. A floating brake adjustment comprisinga right-and-Ieftthreaded member and thrust parts threaded on the endsthereof, and locking means carriedby and floating with saidadjustmentand including a pawl yieldingly interlocking with said member andholding it against unintended turna part forming a pawl yieldinglyinterlocking with said member.

4. A floating brake adjustment comprising a right-and-left threadedmember having thrust parts threaded adjustably on its ends, and meanscarried by said thrust parts and yieldingly interlocking with saidmember.

5. A floating brake adjustment comprising a right-and-left threadedmember having thrust parts threaded adjustably on its ends; and a platehaving its ends carried by said thrust parts and having at its centermeans yieldingly interjusted and which opening is unobstructed by. Q

the locking means.

7. A brake comprising a backing plate, friction shoes carried by theplate, a right-and-left threaded adjusting member having threaded on itsends thrust parts engaging the ends of the shoes, said member and saidparts connecting the shoes, and a yielding locking means carried by saidthrust parts and acting on said member on the side opposite the backingplate, said backing plate having an opening opposite said member throughwhich it may be adjusted and which opening is unobstructed by thelocking means.

8. A brake comprising a backing plate, friction shoes carried by theplate, a right-and-left threaded adjusting member having threaded on itsends thrust parts' engaging the ends of the adjusted and which openingis unobstructed by the locking means.

9. A brake adjustment for a pair of shoes comprising parallel pivotsextending crosswise through the ends of the shoes, an adjusting memberhaving its ends adjustably received in said pivots, and av membermounted on the ends of the pivots and paralleling said adjusting memberand having means yieldingly locking said member.

'10. A brake adjustment for a pair of shoes comprising parallel pivotsextending crosswise through the ends or the shoes, an adjusting memberhaving its ends adjustably received in said pivots, and a resilientplate mounted on the ends of the pivots and paralleling said member andhaving an integral pawl yieldingly locking said member.

'11. A resilient locking plate fora brake adjustment having slotted endsand a. central integral pawl tooth.

12. A resilient locking plate for a brake adjustment having ends formedwith openings and having integral's'paced tongues, and a centralintegral pawl tooth between said tongues.

13. A brake comprising a backing plate, shoes having pivots arrangedwith-their ends slidably engaging the backing plate, an adjustmentconnecting the pivots, and locking means carried by the ends ofthepivotsopposite the backing plate and lockably engaging said adjustment.

'14. A' brake adjustment for a pair of shoes comprising thrust partsextending through'the ends of said shoes, an adjusting member having itsends adjustably received in said thrust parts, and a member mounted onsaid thrust parts and paralleling said adjusting member and having meansyieldingly locking said member.

LUDGER 13. LA BR

